sql = new $class; } // -------------------------------------------------------------------------- /** * Empty a table * * @param string $table */ public function truncate($table) { // SQLite has a TRUNCATE optimization, // but no support for the actual command. $sql = 'DELETE FROM "'.$table.'"'; $this->statement = $this->query($sql); return $this->statement; } // -------------------------------------------------------------------------- /** * List tables for the current database * * @return mixed */ public function get_tables() { $tables = array(); $sql = <<query($sql); $result = $res->fetchAll(PDO::FETCH_ASSOC); foreach($result as $r) { $tables[$r['name']] = $r['sql']; } return $tables; } // -------------------------------------------------------------------------- /** * List system tables for the current database * * @return array */ public function get_system_tables() { //SQLite only has the sqlite_master table // that is of any importance. return array('sqlite_master'); } // -------------------------------------------------------------------------- /** * Load a database for the current connection * * @param string $db * @param string $name */ public function load_database($db, $name) { $sql = 'ATTACH DATABASE "'.$db.'" AS "'.$name.'"'; $this->query($sql); } // -------------------------------------------------------------------------- /** * Unload a database from the current connection * * @param string $name */ public function unload_database($name) { $sql = 'DETACH DATABASE ":name"'; $this->prepare_query($sql, array( ':name' => $name, )); $this->statement->execute(); } // -------------------------------------------------------------------------- /** * Return the number of rows returned for a SELECT query * * @return int */ public function num_rows() { return (isset($this->statement)) ? $this->statement->rowCount : FALSE; } // -------------------------------------------------------------------------- /** * Create an SQL backup file for the current database's structure * * @return string */ public function backup_structure() { // Fairly easy for SQLite...just query the master table $sql = 'SELECT "sql" FROM "sqlite_master"'; $res = $this->query($sql); $result = $res->fetchAll(PDO::FETCH_ASSOC); $sql_array = array(); foreach($result as $r) { $sql_array[] = $r['sql']; } $sql_structure = implode("\n\n", $sql_array); return $sql_structure; } // -------------------------------------------------------------------------- /** * Create an SQL backup file for the current database's data * * @param array $excluded * @return string */ public function backup_data($excluded=array()) { // Get a list of all the objects $sql = 'SELECT "name" FROM "sqlite_master"'; if( ! empty($excluded)) { $sql .= ' WHERE NOT IN("'.implode('","', $excluded).'")'; } $res = $this->query($sql); $result = $res->fetchAll(PDO::FETCH_ASSOC); unset($res); $output_sql = ''; // Get the data for each object foreach($result as $r) { $sql = 'SELECT * FROM "'.$r['name'].'"'; $res = $this->query($sql); $obj_res = $res->fetchAll(PDO::FETCH_ASSOC); unset($res); // Nab the column names by getting the keys of the first row $columns = array_keys($obj_res[0]); $insert_rows = array(); // Create the insert statements foreach($obj_res as $row) { $row = array_values($row); // Quote values as needed by type for($i=0, $icount=count($row); $i<$icount; $i++) { $row[$i] = (is_numeric($row[$i])) ? $row[$i] : $this->quote($row[$i]); } $row_string = 'INSERT INTO "'.$r['name'].'" ("'.implode('","', $columns).'") VALUES ('.implode(',', $row).');'; unset($row); $insert_rows[] = $row_string; } unset($obj_res); $output_sql .= "\n\n".implode("\n", $insert_rows); } return $output_sql; } } //End of sqlite.php